discrepancy       
noun [ C or U ]  formal uk/dɪˈskrep.ən.si/ us/dɪˈskrep.ən.si/
 不一致,出入,差异
a difference between two things that should be the same
  There is some discrepancy between the two accounts. 这两份账单之间有一些出入。 
 The committee is reportedly unhappy about the discrepancy in numbers. 据说委员会对数字不一致很不满。